Chōmei (重明, Chōmei), more commonly known as the Seven-Tails (七尾, Nanabi, Shichibi), is one of the nine tailed beasts. It was last sealed within Fū from Takigakure.
Chōmei resembles a blue, armored kabutomushi (カブトムシ, rhinoceros beetle), with six of its seven tails resembling green insect wings, along with an actual seventh tail, all growing from the end of its abdomen. The stem of the tail is green but the wings are orange. Its eyes seem to be covered by a helmet-like skull, from inside of which, an orange glow can be seen. It also has spike protrusions on its shoulders and a row of slits on each shoulder, and six legs — three on each side. The legs are also covered by the blue armor, with the exception of extreme ends which are green in color. It has two pincers with three parts on its face, covering a mouth full of sharp teeth. On its back behind its head, it has a large two sectioned horned protrusion. During the last remaining days of the Sage of Six Paths, Chōmei was just in its larval stage of development, but still had its tails.
Chōmei seems to have a happy, go-lucky personality — which it seemingly shares with its jinchūriki as shown when it introduced itself to Naruto, referring to itself as "Lucky Seven Chōmei" (ラッキーセブン重明, Rakkī sebun Chōmei), which might be an allusion to the fact that it has seven tails and the number seven having long been seen as a lucky as well as a happy number. It also had a habit of using the word lucky in conversation, reflecting its personality.